it would be  logistically very  simple  
   to  replace your  friends      with 
 actors.    they would hear a knock   
 on their front door,  our  agent  on the 
 other side.    the  agent  would  tell 
 your friend that you're  acting  strange 
   and that  they  are needed  to  help 
 you.    they would, on their way being 
 escorted      to the black car  parked 
 outside,     glimpse  someone  looking 
 eerily like them     being  led toward 
 their   house.       but   they  would 
 nevertheless     get    in    the    car 
      of             ours